RADT_152_Unit_4_Final_Exam - RADT 152 Radiation Protection...

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Unformatted text preview: RADT 152 Radiation Protection Unit 4 Unit Exam Limits for Exposure to Ionizing Radiation 2 4.0 Limits for Exposure to Ionizing Radiation Unit Exam Directions: 1. Write your name and the date on your Scantron form. Identify the subject as the course number (for example, RADT 101) along with the test number (for example, Unit 1). 2. For each of the questions below, select the best answer to the question. 3. Using a No. 2 pencil, fill in the appropriate answer on the answer sheet. 4. Erase unwanted answers completely. Questions with two or more filled in answer spaces are graded as incorrect. 5. Answer all questions. 6. You have a maximum 15 minutes to complete the following 25 questions. (Note this time factor approximates the amount of time you would be allowed to answer the same number of questions on the Registry examination in radiography) ------------------------------------------------------------------------------------------------1. Scientists have developed ______________ to minimize the risk of harmful biological effects (due to ionizing radiation). A. B. C. D. E. 2. BERT OSHA AART Effective dose (E) limiting system Radiation dose equivalent theory The ICRP and NCRP are two organizations that deal with ________________________. A. B. C. D. E. Radiologic Technologist licensure radiation protection standards medical asepsis registration of student RTs approval of Radiological Technologist training programs 3 3. Two functions of _______ are to (1) review regulations formulated by the ICRP and (2) decide on ways to include those recommendations into US radiation protection criteria. A. B. C. D. E. 4. ICRP BERT NRC NCRP OSHA Four functions of the ICRP are to: 1) 2) 3) 4) A. B. 5. True False The effective dose _____________ system is the current method for assessing radiation exposure and associated risk of biologic damage to radiation workers and the general public. A. B. C. D. E. 7. True False Imaging services must have an effective and detailed radiation safety program to ensure adequate safety for patients and radiation workers. A. B. 6. oversee the nuclear energy industry enforce radiation protection standards publish its rules and regulations enter into written agreements with state governments leveling absorbing limiting penetration extraction The sum of both external and internal whole body exposures are considered when effective dose limits are established. A. B. True False 4 8. Radiation risks are derived from the complete injury caused by the radiation exposure. A. B. 9. ALARA stands for As Low As Reasonably Affordable. A. B. 10. all-or-none response mutational biological probabilistic deterministic Which is NOT an example of an early deterministic effect? A. B. C. D. E. 13. The Heel Effect The effective dose limiting system NCRP Cost limiting system Optimization Which is NOT a part of the all-inclusive stochastic category that encompass the radiation induced response of serious concern in radiation protection programs? A. B. C. D. E. 12. True False ALARA is also referred to as _______________ A. B. C. D. E. 11. True False erythema decrease in white blood cell count cataract formation gastrointestinal syndrome hair loss Early deterministic, somatic effects may occur within: A. B. C. D. E. 2 months 1 year 6 months 6 weeks a few hours 5 14. A high probability of deterministic somatic effects occurs when entrance radiation doses exceed: A. B. C. D. E. 15. D. E. liability negligibility risk carelessness overdosing The effective dose (E) limiting system compensates for the differences in risk of cancer from: A. B. C. D. E. 18. the severity of the disease is dose related the severity of the disease is not dose related the chance of cancer induction from a larger dose is the same as that from a smaller dose it decreases with absorbed dose to somatic cells it increases with absorbed dose to germ cells In the medical imaging industry, the possibility of inducing a radiogenic cancer or genetic defect after irradiation is called: A. B. C. D. E. 17. rad rem rad rem rad An aspect of radiation-induced cancer is: A. B. C. 16. 200 200 500 500 600 one one one one one person to another cell to another population to another radiographer to another organ to another The greatest risk for radiation-induced mental retardation occurred when the embryo-fetus was exposed: A. B. C. D. E. 8-15 weeks after conception 16-20 weeks after conception 21-25 weeks after conception 26-34 weeks after conception the risk factor remains the same throughout the entire pregnancy 6 19. The current NCRP recommendations for an annual occupational effective dose limit is __________, not including medical and natural background exposure, for the whole body. A. B. C. D. E. 20. What is the formula for the cumulative effective dose limit in traditional units? A. B. C. D. E. 21. HT=1 rem-age HT x age=1 rem HT=age x 1 rem HT + age= 1 rem HT – age= 1 rem To reduce exposure for pregnant female imaging professionals and control the exposure to the unborn during potentially sensitive periods of gestation, the NCRP now recommends a monthly equivalent dose limit not exceeding __________ to the embryo-fetus after declaration of a pregnancy? A. B. C. D. E. 22. 1 rem 3 rem 5 rem .05 mrem 10 mrem 0.05 rem 0.5 rem 15 rem 20 rem 50 rem Which of these provides a low-exposure cut-off level so that regulatory agencies may dismiss a level of individual risk as negligible risk? A. B. C. D. E. negligible medical dose occupational dose limit nonoccupational dose limit tissue weight factor negligible individual dose 7 23. A beneficial consequence of radiation for populations continuously exposed to moderately high levels of radiation is called: A. B. C. D. E. 24. The most important item for medical imaging personnel to be familiar with is: A. B. C. D. E. 25. nonoccupational equivalent dose radiation hormesis effect radiation negligible risk level effect radiation benevolent effect effective dose limit ALARA negligible individual dose lifetime effective dose cumulative effective dose limit 5 rem/year whole-body occupational dose limit In order to protect the radiation workers and the population as a whole, ______________________ have been established as guidelines. A. B. C. D. E. tissue weighting factors negligible individual dose limits effective dose limits embryo-fetus exposures occupational exposure guidelines ...
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This note was uploaded on 11/12/2011 for the course RADIOLOGY 152 taught by Professor Walters during the Spring '11 term at Boise State.

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